Galactic Civilizations IV: Supernova Galactic Civilizations IV: Supernova Galactic Civilizations IV

(LIVE) v3.31 Update Changelog

Published on Wednesday, June 17, 2026 By RammaStardock In GalCiv IV Support

Hello everyone! We have a patch ready for you today focused on game balance updates, improved hotkeys, and enhanced overall stability.
Read below for details!

June 18th, 2026 Change Log


Gameplay

  • Fixed an issue where if a non-mining Starbase was built near a resource first and a player tries to build a second mining Starbase , the second Starbase now correctly mines the resource

  • Reworked the Sanctuary Lattice Module so pollution reduction now applies as a direct area-effect stat instead of a triggered modifier, which should apply more reliably, and the icon has also been updated

  • Increased Ceasefire credit exchange from 200 to 500 when accepting and increased the penalty from 400 to 500 when paid to a rival, so ceasefire deals now carry more weight in negotiations

Ship Hull Rebalance

  • Tiny Hull: Mass capacity increased from 6 → 7 (fixes AI building bombers with no weapons)

  • Small Hull: Mass capacity increased from 18 → 20

  • Medium Hull: Mass capacity increased from 36 → 40

  • Large Hull: Mass capacity increased from 80 → 150

  • Huge Hull: Mass capacity increased from 200 → 300

Improvements

  • Industrial Center: Pollution per level now scales as a flat value instead of a multiplier (prevents runaway pollution on high-level worlds)

  • Planetary Harvester (Synthetic): Pollution per level changed from multiplier to flat scaling

  • Terran Grand Arts Center: Approval per level increased from 0.01 → 0.02

Hotkeys

  • Resolved base game and console hotkey usage overlap. New console hotkeys are

    • CTRL + F1 - teleports the selected object to the cursor

    • CTRL + F2 - clones the object

    • CTRL + F3 - resets moves

    • CTRL + F4 - deletes the object

Localization

  • Added in translations in all supported languages for the new planet and resource context windows and adaptive AI settings

Map Generation

  • Rebalanced map setup values across all density presets

Stability

  • Resolved a crash for late game enemy ship turns

  • Resolved a crash when closing the Ship Designer

  • Fixed a crash that could occur during game startup

  • Fixed a crash that could occur during turn rollover or autosave while in or exiting the shipyard

Text

  • Removed duplicate text for Drengin messages